Cartridge pen for electronic display board



FIG. 1 is a front view of the cartridge pen for electronic displayboard;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective view thereof.

The ornamental design for cartridge pen for electronic display board, asshown and described.